IME the Power Groove is the *strongest* of the three in terms of both overall hook and breakpoint shape. For me, the Red Pin was slightly earlier than the Power Groove, but had more of an arc shape at the break. The Dry/R is just as long in front as the Power Groove, but is much weaker when it makes the turn.
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...formerly "The Curse of Dusty," and "Poöter Boöf" before that...